The optimized and mountain-ready construction of the Yeti® Tundra Cooler is design specifically for elite outdoorsmen and adventurers who seek extreme adventures. The hottest sun, the coldest blizzards and biggest bears have put these coolers to the test and failed to overcome them. They have tumbled off cliffs and fallen into icy rivers. Tundra coolers have surpassed everything nature can throw at them and there are no conditions on reliability under the worst possible conditions.